181041665004 has 84 divisors (see below), whose sum is σ = 479629682896. Its totient is φ = 59761227168.

The previous prime is 181041664961. The next prime is 181041665009. The reversal of 181041665004 is 400566140181.

181041665004 is a `hidden beast` number, since 181 + 0 + 416 + 65 + 0 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 181041665004.

It is not an unprimeable number, because it can be changed into a prime (181041665009) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1039 + ... + 601734.

Almost surely, 2^181041665004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181041665004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239814841448).

181041665004 is an abundant number, since it is smaller than the sum of its proper divisors (298588017892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181041665004 is a wasteful number, since it uses less digits than its factorization.

181041665004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602898 (or 602881 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 181041665004 in words is "one hundred eighty-one billion, forty-one million, six hundred sixty-five thousand, four".